Avatrombopag (YM477) is a new oral thrombopoietin (TPO) receptor agonist, activating TPO receptor and increasing megakaryocytic proliferation/differentiation and platelet production.

Avatrombopag, also known as AKR-501, YM477, AS 1670542 or E5501, is a novel orally-active thrombopoietin (TPO) receptor agonist. AKR-501 specifically targeted the TPO receptor and stimulated megakaryocytopoiesis throughout the development and maturation of megakaryocytes just as rhTPO did. AKR-501 may be useful in the treatment of patients with thrombocytopenia. Avatrombopag was first approved in 2018.

Avatrombopag hydrochloride (AKR-501) is an orally active, nonpeptide agonist of the thrombopoietin (TPO) receptor with an EC 50 of 3.3 nM. It effectively mimics the biological activities of TPO, stimulating platelet production by activating the intracellular signaling system and facilitating the generation of platelets and megakaryocytes from hemopoietic precursor cells. Additionally, Avatrombopag hydrochloride serves as a substrate for cytochrome P450 (CYP) 2C9 and CYP3A.

Avatrombopag-d8 is a deuterated compound of Avatrombopag. Avatrombopag has a CAS number of 570406-98-3. Avatrombopag is a new oral thrombopoietin (TPO) receptor agonist, activating TPO receptor and increasing megakaryocytic proliferation/differentiation and platelet production.